What Has Metaphysics to Do with Wisdom? John Haldane There are two loci of ambiguity in the title of the symposium from which this essay derives—"Is Belief in God Reasonable? Aquinas's Summa contra gentiles in a Contemporary Context."1 The first concerns the opening question, "is belief in God reasonable?" and the second the closing clause "in a contemporary context." I observe this not in the spirit of pedantry, but because I want to consider certain interpretations of what is at issue, ones which may be different from those of other contributors but which are relevant to Aquinas's circumstances and interests and to ours. So far as the Summa contra gentiles [SCG] is concerned, I will touch mainly on issues discussed by Thomas at the outset of book I, in chapters 1–15, which deal with philosophical knowledge of first principles and arguments to the existence of God. First, however, the general issue of reasonable belief. I Concerning the first locus of ambiguity, the question of the reasonability of belief in God is multiply interpretable. It may be treated as relative to a subject's other beliefs and attitudes, where that subject e may be an individual or a group. Given that S believes p and q (and these can each be conjunctions of any number of propositions), is it reasonable for S to believe r? This aspect of relative credibility is itself ambiguous because it [End Page 1249] can be viewed narrowly, without regard to the status of those antecedent beliefs and attitudes, or broadly, as also asking whether those are themselves reasonable. In a court setting, for example, it may be asked whether it was reasonable for someone to have believed (or done) something given their antecedent beliefs, but it may well be countered that this is an insufficient standard of reasonability, since the prior attitudes may be incredible, or credible but irresponsibly held. The issue of reasonable belief, foresight and foreseeability are common courtroom examples. In these respects, then, it may be granted by someone A, who holds that believing in God is not reasonable, that it was nevertheless reasonable for S to do so given S's antecedent beliefs. This need not be a matter of condescension, however, since A may grant that the prior beliefs were themselves reasonable for S to hold, and would also have been reasonable by some more objective standard prevailing at the time or in the circumstances. A "rationalist" objector may counter, however, that this is all beside the point, since the question to consider is not the relative, but the absolute one: is belief in God reasonable? Full stop. I agree that there is nothing to be gained by unconstrained relativizing, but if "absolutism" is the implied contrast, it is over-stated. First, if reasonability is related to having (or having access to) reasons, and to the "quality" of those reasons, then some degree of relativity is entailed, and the only standard of reasonability that can be applied is a contextual one. To ask simpliciter whether it is reasonable to believe p carries an unacknowledged implicit reference either to something such as prevailing commonly held beliefs and associated normal cognitive processes or to an idealized thinker with access to relevant proofs or evidence. On further consideration, however, the latter, somewhat like Adam Smith's "impartial spectator" in ethics,2 tends just to be a more abstract version of the contextually reasonable thinker. There is perhaps a step beyond this, namely to the Omniscient Reasoner (OR) but it is a sophistical move, since it amounts to saying that a belief is reasonable if and only if it would be held by someone who knows everything relevant to its justification. which given that we cannot know antecedently the range of relevant considerations, is for us an inapplicably high standard. There is also some irony in asking if OR would judge belief in God Reasonable since OR would be God or at least God-like in respect of being all-knowing. [End Page 1250] II The other respect in which the question "is belief in God reasonable?" is ambiguous (in this first of the two areas ambiguity noted at the...
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